Observation by John Hughes: Messier 1 re-visited

Uploaded by

Mr John William Hughes


John Hughes


2020 Jan 18 - 19:16


2020 Jan 27 - 19:25


The Crab Nebula (M1)

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Field centre

RA: 05h34m
Dec: +21°59'
Position angle: +2°08'

Field size

1°28' × 1°10'

  • William Optics Z103
  • ZWO ASI1600mm Pro Cool
  • Skywatcher EQ6R Pro
  • Baader Ha 7nm, Sii 8nm & Oiii 8.5nm filters
  • Sequence Generator Pro & Pixinsight

Ha & Sii (Gain 139 Offset 21) Oiii (Gain 75 Offset 15)


North Essex

Target name

Messier 1


Messier 1 re-visited

About this image

Messier 1, Crab Nebula. 

I have been photographing this supernova remnant during the clear nights available to me in January. This image is based on the Hubble Palette and uses Sulphur, Oxygen and Hydrogen filters (Sii/Oiii/Ha) to create this pseudo colour picture.

Each image of which there are 85 is made up of 5 minute exposures;

Sii 25 x 5 mins
Ha 30 x 5 mins 
Oiii 30 x 5 mins

These images were then calibrated and stacked using the software, Pixinsight.

Time to move on to another target now though I will be returning to M1 next year to capture some more data.

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